; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes=jump-threading,loop-rotate,instcombine,indvars,loop-unroll,simplifycfg -simplifycfg-require-and-preserve-domtree=1 -verify-dom-info -verify-loop-info < %s | FileCheck %s

; Jump threading should not prevent this loop from being unrolled.
; There should be 3 volatile stores and no branch

target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i386-apple-darwin9.6"
@v1 = external global i32		; <ptr> [#uses=2]

define i32 @unroll() nounwind {
; CHECK-LABEL: @unroll(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    store volatile i32 1000, ptr @v1, align 4
; CHECK-NEXT:    store volatile i32 1001, ptr @v1, align 4
; CHECK-NEXT:    store volatile i32 1001, ptr @v1, align 4
; CHECK-NEXT:    ret i32 0
;
entry:
  br label %bb4

bb:		; preds = %bb4
  %0 = icmp eq i32 %i.0, 0		; <i1> [#uses=1]
  br i1 %0, label %bb1, label %bb2

bb1:		; preds = %bb
  store volatile i32 1000, ptr @v1, align 4
  br label %bb3

bb2:		; preds = %bb
  store volatile i32 1001, ptr @v1, align 4
  br label %bb3

bb3:		; preds = %bb2, %bb1
  %1 = add i32 %i.0, 1		; <i32> [#uses=1]
  br label %bb4

bb4:		; preds = %bb3, %entry
  %i.0 = phi i32 [ 0, %entry ], [ %1, %bb3 ]		; <i32> [#uses=3]
  %2 = icmp sgt i32 %i.0, 2		; <i1> [#uses=1]
  br i1 %2, label %bb5, label %bb

bb5:		; preds = %bb4
  ret i32 0
}
